D. Addressing, Topology, and Routing

What is the (distribution of the) distribution of hosts per subnet, and subnets per AS? (intranet topology)

What are the convergence properties of the current routing protocols?

Which ASes control how much of the Internet address space?

What percent of Internet links block ICMP or other probing traffic?

Can we characterize the distribution of hosts hidden behind NAT?

What percentage of users on public wireless networks uses VPNs?

How many four-byte ASes exist?

How much allocated but "unused" IPv4 space remains?

For ISPs appearing in different geographic regions around the
world, do peering relationships change depending on the location?

E. Measurement Methodology and Experimental Design

How can we measure host-to-host clock skew and NTP pool drift characteristics?

How can we probe IPv4/IPv6 in a better way?

How many measuring points do we need?

How much storage will be required?

How can I determine whether a cable modem acts as a bridge or a router? Do probes
stop at the modem or make it through to a device behind the modem?

How dynamic are dynamic address assignments? What is the distribution of the time
that a dynamically assigned address remains assigned to a single
customer?

What are appropriate guidelines for measurement, data sharing, and data analysis, to minimize impact on the network and privacy?

How do we evaluate the scalability of a measurement system?

How do we anonymize data while still preserving the maximum utility possible for research?

What can/should we measure from the edge?

What incentives would increase participation in data sharing?

F. Social

The following questions pertain to the ever increasing role of the
Internet in the modern society. While not immediately answerable with
the available and even expected data, these questions extend the
scope of future Internet research efforts and tie its technical
foundation with the core interests of its human users.

What are generational differences in Internet use?

How will high-speed broadband effect consumer behavior?

What is the language distribution of content?

How many people object to government or ISPs sniffing traffic?

How much of Internet infrastructure is under control of organized crime?